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Well, once you have it down to bare metal. Use Self-Etching Primer. It is made to go on bare surfaces and provide excellent Adhesion. I prefer the brand SEM. But I'm sure some others will do the job fine as well. As far as chemicals to help prevent rust and kill it, There are some out there.

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They make a small hand held sand blaster called the speed blaster it holds about a quart of sand it would be perfect for that.You will need an air compressor the small unit costs about $30.00 and works very well it is perfect for cleaning small parts like that.You can find one at Autobodystore.com or any auto body suppliers.Ive had one for about 3 years still works great.Mike

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Be sure you get all that stinking powdercoat off. I hate powdercoat due to frequency of its misuse.

80% of failures are from 20% of causesNever compromise your principles today in the name of furthering them in the future."All I ever wanted was an honest week's pay for an honest day's work." -Sgt. Bilko"We are generally better persuaded by reasons we discover ourselves than by those given to us by others." -Pascal"Since we cannot know all that there is to be known about anything, we ought to know a little about everything." -Pascal

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you can use a wire cup on your grinder to get the bulk of the rust off then go to your local auto paint store and buy a product called "Rustmort". brush or spray it on with a spray bottle and let it dry. it turn any rust to a black oxide primer. anywhere it contacts no rust will stay wet. just hose that off with water, dry it off good then use any primer and paint. i've used this on a lot of farm equipment and as long the paint stays intact with no bare metal you won't have any reoccurring rust.

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They make a small hand held sand blaster called the speed blaster it holds about a quart of sand it would be perfect for that.You will need an air compressor the small unit costs about $30.00 and works very well it is perfect for cleaning small parts like that.You can find one at Autobodystore.com or any auto body suppliers.Ive had one for about 3 years still works great.Mike

Don't want to hi jack the thread but how much CFM or how big of a tank do you need for one of those small hand held blasters? Would an 8 gallon tank do it?
Thanks in advance

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Thanks, the guy I bought it from pulled it from a Forester. It's going on an Impreza though. Already mocked it up and it should fit no problem (my 97 Impreza and his 2000 Forester have the same basic chassis). So I have a class III hitch going on an application that normally would only have a class I hitch. Not that I'm going to be pulling anything that requires class III.

I've made some good progress in removing the rust and paint. No pics of the progress yet, I'll try to get some up soon.

I stopped by Harbor Freight and picked up a wire wheel and cup, also picked up one of these for grins:

WOW, I'm impressed! That thing pulls paint off like wiping dust off with a rag. Well, maybe not quite that easily but I like it compared to other things I've used. It does OK with the rust, but was worth it to strip the paint without damaging the metal.

It's time for a a bit more brushing, chemical on the rust spots and then primer/paint.

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OSPHO
is really a phosphoric acid conversion coating... and does not really remove much rust.. just leaves a phosphate layer on it... it is good stuff for what it was intended but I would not use it on the heavy stuff.. here is a link to their site...